I have Checked that the chassis mounting screws correctly line up with the holes in the mother board.
What is a "overcurrent trip" ?
You say that "If this unit works in a different box and the MB works in a different box, then the BOX is shorting the power" so, why the box is shorting the power? can i fix it?
tnks and sorry about my english
You may have already checked this, but also look at the stand-offs on the chassis, see if any of which are hitting the motherboard.
Also, what if you move the power supply from the working chassis to the other one - see if this helps.
Check the rubber bumper too, http://www.intel.com/support/motherboards/server/se7520jr2/sb/cs-014557.htm
& you probably have this information too, but the QSG gives you information on the stand-offs/mounting points http://www.intel.com/support/motherboards/server/s5000vsa/sb/CS-022691.htm
There isnot stand-offs on the chassis which are hitting the motherboard.
If i change the power supply like i say in the first its the same the server not start and the led on the PSU turn orange. I had tried with 2 PSU thats are working ok in the other chassis.
I follow all the manuals to build the server, and i use the rubber bumper thats come with the server chassis.
I think that the orange led in the PSU indicates one error that i cant find any info in the intels manuals.
Thks, and sorry about my english